My speaker sounds like Voldemort

I have a orbitsound one p70w soundbar that's producing a low hiss on all volume levels, it's only present on bluetooth, optical and line in are fine, does it with every device even after a system reset and doesn't change with location, it's also only present when content is played, probs kicks in about a millisecond before content starts and stops if you pause it ..almost like its hearing its self power up.